Why did a bunch of asteroids hit the Earth billions of years ago?
The first cells of life on Earth had a lot to contend with. Conditions were harsh and unpredictable. The air was thick with volcanic gases.…
Category: What happened in Earth’s past?
What was the Earth like a long time ago? What have archaeologists found? What was it like before life started? How did life come to be?
Where did all these plants come from?
Without plants on earth, we would not be here. But, where did plants come from? Did they suddenly just sprout out of the ground? Scientists…
Antibiotic-resistant bacteria are way older than penicillin
Remember the classic chases where Wile E. Coyote tries to catch Roadrunner but is often outsmarted? It turns out that bacteria have to…
Ancient bacteria leave behind fossils, too!
Scientists used genetic technology to identify the different roles of bacteria present in ancient fossil formations called stromatolites.
A detailed look at a rare meteorite
A carbonaceous meteorite that fell in Costa Rica holds organic compounds that are preserved from the earliest stages of our solar system,…
Building the molecules of life in the lab
The hyperbranched polymer scaffold could have been the early primitive base for the emergence of life. @t_z_jia @CerberaOdollam…
Searching for the first light of fireflies
Fireflies are bioluminescent, which means they glow. But were they always that way? Why do they glow? Scientists used genetics tools to find…
Intelligent life might be rare
How hard is it for evolution to produce intelligent life like humans? We don't really know, but some computational modelers tried to answer…
The shape of the continents is not a coincidence
Biological processes might have led to greater continental crust coverage than would be expected on a planet without life.
Could impact from asteroids eventually create life?
Astrobiologists have discovered a possible new pathway for the prebiotic self-assembly of biologically important molecules by replicating…